Manifold construction for explosion-engines.



I L. COBB. MANIFOLD CONSTRUCTION FOR EXPLOSION ENGINES.

. APPLICATION FILED HD1323, 1913. r 1,099,842, Patented June 9, 1914.

Attorneys UNIT STATES FATENTOFFICE.

LUTHER corn, or nnnronn, INDIANA, AssIeNon or ONE-HALF r0 FRED n, JAeKsoN AND ONE-HALF 'ro JAMES n. MARTIN, BOTH or BEDFORD, INDIANA.

MANTFOLD CONSTRUCTION FOR EXPLOSION-ENGINES.

roadster Application filed-June 23, 1913. Serial N 0. 775,342.

The present invention relates to' improvements in manifold constructions for explosion engines, one object of the invention, be-

ing the provision of a manifold construction, I

in which the intake manifold isdisposed within. the exhaust manifold, and has a plu-- rality of branches led thereto, whereby a volatile and a less volatile explosive fluid to be converted into carbureted air may be properly directed into'the intake ports of the engine, the heated exhaust manifold assisting in the vaporization of the less volatile fluid, so as to provide the necessary and desirable carbureting or vaporizing thereof before the introduction into the explosive engine.

A further object of the present invention is the provision ofmeans whereby two characters of carbureted air may be'supplied to the explosive engine and whereby the introduction of the explosive charge may be regulated.

\Vith the foregoing and other objects in view which will appear as the. description proceeds, the invention resides'in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed can be made within the scope of what is claimed without departing from the spirit of the invention.

In the drawings Figure 1 is a vertical sectional view through the intake and exhaust manifold of the present device with the cylinders of an explosion engine in elevation. Fig. 2 is a top p1 an view of an engine with the present manifold construction in horizontal section along the portage line of the cylinder. I

Referring to the drawings, the numerals 1 and 2 designate the forward two and rear two cylinders of an explosion engine, such two cylinders, las illustrated, being cast en bloc and provided as shown, with the intake ports 3, 4, 5 and 6 and the exhaust ports 7, -8, 9 and 10. As clearly shown in Fig. 1, p

. Specification of Letters Patent.

' Patented June a, 1914;

the exhaust ports of the respective cylinders are theouter ports,while the intake ports are disposed between the two exhaust ports of each pair of cylinders andtherefore constitute the inner ports.

The exhaust manifold 11 is connected to both cylinder membersso as to embrace the ports 7, 8, 9 and 10 and thus receive the exhaust gases from all cylinders of the engine, while in order to provide a means for assisting in the vaporizing of the mixture admitted to the respective ports 3, 4, 5 and 6, the two intake manifold branches 12-12 are disposed so that the greater portion thereof are enveloped by the exhaust mani- "fold 11 while the inner terminals of the branches 1212 surround the respective ports 31 and 56 so that at the proper time the explosive charge is admitted through such ports to the cylinders of the engine.

This particular manifold construction is especially adapted for use in connection with two fuel. supplies, as for instance gasolene which is the volatile fluid most often used and'also with kerosene, which being a less volatile fluid cannot be used to primarily start the engine. In order :to provide a means therefore to permit the startingof the engine by the employment of a carbu-- reted air. formed from gasolene, and after the branches 1212 have been' heated due to the exhaust gases passing through the 17 of the two branches 13-13 and is thus movable to and from the port 14. l Connected to the lower end of the branch .the branch 13. v

running and has become sufficiently heated,

ploy'ed, the same being provided with a butterfly valve 21 to limit the amount of explosive charge supplied to the branch 13.

Fromlthe foregoing description, taken in connection with the drawings, it'is evident that by the employment of the gas'olene car.-

'bureter 18, that the engine may be started as is the usual practice, the butterfly valve 21 being closed so as to prevent the introduction ofany of the kerosene charge into As, soon as the engine is the exhaust charge through the manifold 11 having heated the branches 1212 of the intake manifold, the butterfly valve 21 is opened and the kerosene supplying medium is connected so that the carburet'ed air composed of air and kerosene is directed through the branch 13 into the intake branches 1212. When the engine is operating properly, the butterfly Valve 19 is closed,

and then the only supply for the carbureted 'air is from the kerosene supplying member 20. Thus with the present structure, the branches 12-12 constitute the heated vaporizing chamber for the carbureted air, and

' provide a means, whereby the volatile and pered down from a carbureted air consisting entirely of gasolene and air to an intermediate carbureted air composed of gasolene and air and kerosene and air, to the final main mixture of kerosene and air. proper operation of an explosion engine with the two fuels, as indicated will be rem-- dered more eflicient, it having been discovered that the less volatile fluid must be heated so as tolproduce the best possible vaporization and mixture for explosion engines. What is claimed is: The combination with an explosion engine having an exhaust manifold,*of an intake manifold having the greater portion thereof incased by the exhaust manifold and provided With a port intermediate its ends and through the under side thereof, two car'- bureted air supplying branches both leading to said port, portions of the branches being joined together below the port, a valve stem mounted in the portion of the branches below the port and operable from the outside, a conical valve carried by the stem Within the branches and manifold for movement to Thus theand from the port, and two explosive mixture forming devices, one connected to each branch.

In testimony that I claim the foregoing as my own, I have hereto affixed my signature in the presence of two witnesses.

Roar. L. MELLEN, J. C. MCKINNEY. 

